For the large suspicious ulcerated lesion described in the previous question, which biopsy type is most appropriate?

For a large lesion suspected of being squamous cell carcinoma, incisional biopsy is the preferred approach. An incisional biopsy removes a representative sample from the most suspicious area of the lesion (typically the margin between normal and abnormal tissue, avoiding necrotic center). Excisional biopsy (complete removal) is not appropriate for large suspicious lesions because it may compromise the ability to assess surgical margins if malignancy is confirmed and definitive surgery is planned. Punch biopsy can be used but a scalpel incisional biopsy provides more tissue and better orientation.